Kotlin Multiplatform Developer (KMM) – Zero Trust Architecture (m/f/d)

We are looking for a Kotlin Multiplatform Developer to join a team building secure mobile solutions aligned with Zero Trust Architecture principles. The role involves developing and maintaining shared cross-platform modules using Kotlin Multiplatform Mobile (KMM), implementing secure authentication and authorization mechanisms, and integrating with enterprise identity providers.

Founded in 2018, UPVANTA SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ is a dynamic IT services company with a team of over 180 professionals, experiencing exceptional year-over-year growth.

• Strong experience with Kotlin development.
• Hands-on experience with Kotlin Multiplatform Mobile (KMM).
• Good understanding of security standards and protocols: OAuth 2.0, OpenID Connect, MFA, SSO.
• Experience integrating mobile apps with IAM / Identity Providers.
• Knowledge of secure token handling and credential storage on Android/iOS.
• Ability to write maintainable code and automated tests.
• Understanding of mobile security risks and mitigation techniques.

Nice to have:

• Experience working in environments applying Zero Trust Architecture.
• Familiarity with mobile device integrity solutions and anti-tampering approaches.
• Experience in regulated industries (banking, fintech, enterprise security).

• Develop and maintain cross-platform modules using Kotlin Multiplatform Mobile (KMM).
• Implement secure authentication and authorization flows such as OAuth 2.0, OpenID Connect, MFA, and SSO.
• Integrate with identity providers and enforce least privilege access and continuous verification.
• Collaborate with security architects to embed Zero Trust principles into mobile client design.
• Ensure secure storage of credentials and tokens using platform-specific mechanisms (e.g., Android Keystore, iOS Keychain).
• Monitor and respond to runtime security signals (e.g., device integrity checks, jailbreak/root detection).
• Write clean, testable, and efficient Kotlin code for both shared and platform-specific modules.